Guest Stars

James Doohan voiced Robert Wesley Recurring	Majel Barrett voiced Cosmic Cloud Recurring

Main Cast

William Shatner voiced Captain James Tiberius Kirk	Leonard Nimoy voiced Commander Spock
DeForest Kelley voiced Dr. Leonard Horatio "Bones" McCoy	James Doohan voiced Lt. Cmdr. Montgomery "Scotty" Scott, Lt. Arex
Nichelle Nichols voiced Lt. Uhura	George Takei voiced Lt. Hikaru Sulu

Recap

The Enterprise is sent to investigate an enormous cosmic cloud that has entered from beyond the edge of the galaxy and is approaching the planet Mantilles on the furthest edge of the Federation. Sensors indicate the cloud is 800,000 kilometers across and half that in depth, and is composed of a mixture of matter and energy. It enters the Mantilles system and approaches the outermost uninhabited planet, Alondra... and envelops it. Spock scans the area and determines that the cloud is consuming the planet. It then changes course and heads directly toward Mantilles. The Enterprise moves to intercept it in time and Spock notes that if the creature can consume stars as well as planets, it could pose a threat to the entire galaxy. Kirk wonders if they should notify the 82 million inhabitants of Mantilles or if the resulting panic would cause more harm then good. He tells McCoy that the governor is Bob Wesley, a former Starfleet officer and a steady man, and McCoy advises him to contact Wesley and notify him of the situation...

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• Creator	Gene Roddenberry
• Producer	Lou Scheimer  |  Norm Prescott
• Associate Producer	D. C. Fontana
• Story Editor	D. C. Fontana
• Art Director	Don Christensen
• Supervising Director	Hal Sutherland
• Production Manager	Rock Benedetto
• Executive Consultant	Gene Roddenberry
• Special Effects	Reuben Timmins